Computer Science – Performance
Scientific paper
Dec 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aas...207.1207k&link_type=abstract
American Astronomical Society Meeting 207, #12.07; Bulletin of the American Astronomical Society, Vol. 37, p.1171
Computer Science
Performance
1
Scientific paper
We have been developing x-ray microcalorimeters for the Constellation-X mission. Devices based on superconducting transition edge sensors (TES) have demonstrated the potential to meet the Constellation-X requirements for spectral resolution, speed, and array scale (> 1000 pixels) in a close-packed geometry.
In our part of the GSFC/NIST collaboration on this technology development, we have been concentrating on the fabrication of arrays of pixels suitable for the Constellation-X reference configuration. We have fabricated 8x8 arrays with 0.25-mm pixels arranged with 92% fill factor. The pixels are based on Mo/Au TES and Bi/Cu absorbers. We have achieved a resolution of 4.9 eV FWHM at 6 keV in such devices.
Studies of the thermal transport in our Bi/Cu absorbers have shown that, while there is room for improvement, for 0.25 mm pixels our existing absorber design is adequate to avoid line-broadening from position dependence caused by thermal diffusion. In order to push closer to the 4-eV requirement and 2-eV goal at 6 keV, we are refining the design of the TES and the interface to the absorber.
For the 32x32 arrays ultimately needed for Constellation-X, signal lead routing and heatsinking will drive the design. We have had early successes with experiments in electroplating electrical vias and thermal busses into micro-machined features in silicon substrates. The next steps will be fabricating arrays that have all of the essential features of the required flight design, testing, and then engineering a prototype array for optimum performance.
Bandler Simon R.
Chervenak James A.
Figueroa-Feliciano Enectali
Finkbeiner Fred M.
Iyomoto Naoko
No associations
LandOfFree
High-density arrays of x-ray microcalorimeters for Constellation-X does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with High-density arrays of x-ray microcalorimeters for Constellation-X, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High-density arrays of x-ray microcalorimeters for Constellation-X will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1277638